alluvium(redirected from Alluvial deposits)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to Alluvial deposits: Lacustrine deposits
The material deposited on land by virtue of the process of accretion. The accretion process occurs when rivers or other waters deposit silt and mud on land,and thus create more land; the silt and mud making up the new land is called alluvium.